The update downloaded and installed smoothly.Just as it finished, WIN Patrol popped a
notice for a Vipre proxy service (expected).Before I could respond to that, the system blue screened. (Gasp! No!!)Before I could read the blue screen error
code, the system auto booted. (I was now very glad I had imaged the system just
minutes before)The boot up (via the DOS
screen for selecting a safe boot - I selected a normal boot) was indeed
completely normal.

I checked Event Viewer to see if, per chance, there was any
meaningful info there. EV would not run, but pointed to the WMI service as not
running. The WMI service was stopped and failed to start, displaying an error
code (ERR 4201).Googling that error
code indicated a corruption of WMI log files. Renaming the
System32/LogFiles/WMI/RtBackup folder solved the problem.